According to Dennis (1940), What Happened to Hopi Infants Who

According to Dennis (1940) , what happened to Hopi infants who were placed on cradleboards until their first birthday?

A) They developed skills such as sitting, creeping, and walking in the usual sequence and at the same times as non-cradle-boarded, non-Hopi children.
B) They suffered extreme limb damage, particularly to the legs.
C) They lagged in verbal ability as a result of the deprivation of motor skills.
D) All selections are correct.